How many portable toilets does an industrial crew need?
Chicago's plumbing code asks for at least one toilet per 30 employees or fraction of 30. OSHA's construction rule asks for one toilet for 20 or fewer workers, then one toilet seat and one urinal per 40 workers beyond that. Where the two differ, the stricter number governs; confirm it with the permit office.
The two rules are written in different units, so they are worth reading side by side. The Chicago Plumbing Code says no one may start construction, alteration or repair of a building without sufficient toilet facilities for employees, with at least one per 30 employees or fraction. OSHA 29 CFR 1926.51(c) sets 1 toilet for 20 or fewer workers, then 1 toilet seat and 1 urinal per 40 workers when there are more than 20, and per 50 workers once a site reaches 200 or more.
A fraction counts. On the city's rule, a crew of 31 needs two toilets, not one. Do not round down to make the count work, and do not size a site for the average day when the busiest day has a second contractor on it.
Which rule applies to your project is for the project's permit office to confirm. This page states the figures as they are published. It does not tell you that any particular unit or count satisfies a code, and neither does Chicago Porta Potty Rental. For long builds, see long-term portable toilet rental.
Where should the units go on a working industrial lot?
Put them where workers already walk, off the route of forklifts, trucks and cranes, on firm ground a service truck can reach. OSHA expects toilets to be reachable in under 10 minutes, and the Chicago code allows non-sewer toilets on private property only if they stay at least 5 feet from property lines.
The 10 minute point is easy to miss on a big yard. A lot that is a long walk across active truck lanes, or a building where the nearest toilet is on another side of a fence, can fail the reachability test without anyone noticing. Count the walk from the farthest working area, not from the site trailer.
Check the lot's edges too. The Chicago code requires non-sewer toilets on private property to be at least 5 feet from property lines, and a crew that packs a fence line to keep the middle clear can end up inside that distance. Ask the provider to look at the placement, and ask the permit office when you are not sure.
Who keeps the units clean on a site with no office?
The provider services the units on the schedule you agree, and the crew keeps the area around them clear. OSHA's rule says unsanitary toilets do not count toward the required number, so a unit that has filled or been left dirty is a unit you are short of. Nobody on site should attempt the servicing.
Industrial sites often have no one looking at a toilet but the people using it. That is why the schedule matters more here than at an event that lasts a weekend. A crew that starts at dawn and finishes at dusk uses a unit all day, and a unit that is full by Thursday is a problem for the next four days.
Servicing means the provider's truck comes and does the work: emptying, cleaning and restocking. It is not a job for a foreman, a laborer or a worker on a slow afternoon. Do not try to empty, lift or tow a unit yourselves. If a unit is full, damaged or tipped, call the provider.
Give the provider one contact who will answer for the site and someone who can open the gate. A truck that arrives to a locked yard is a missed servicing, and the crew pays for it later.